What kind of bone does phalanx belong to?

summary

Phalanges are small long bones distributed in the fingers. There are 14 phalanges, two of thumb and three of the other four fingers. From the proximal to the distal, there are proximal phalange, middle phalange and distal phalange. What kind of bone does phalanx belong to? Let's talk about it

What kind of bone does phalanx belong to?

Each phalanx is also divided into three parts: base, body and capitulum. The base of proximal phalanx is an oval concave articular surface, which is connected with metacarpal capitulum. The articular surface of the capitulum is in the form of trochlea, which is called phalangeal trochlea, and is connected with the base of the middle phalange. The distal end of the distal phalanx is slightly enlarged and rough, which is called nail trochanter. There are 28 phalanges, 14 in each hand.

Each hand has 5 metacarpal bones, which are short tubular bones. On the anteroposterior radiograph, there is a bone marrow cavity in the cortex of the metacarpal shaft. The cortices at both ends are very thin and contain cancellous bone. The proximal end of each metacarpal bone is square, which forms a carpometacarpal joint between the base of metacarpal bone and carpal bone. The distal part is spherical, and the metacarpal head and the base of phalanx form metacarpophalangeal joint,

There are 14 phalanges in each hand, 2 in thumb and 3 in other fingers. The proximal end of each phalanx is wide and sparse, the distal end of the phalanx (proximal phalanx and middle phalanx) is trochlear, and the distal end of each distal phalanx is pestle shaped, which is called trochanter.

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